Martin Christ RVC 2-33 CDplus - Manual (Page 44)

Rotational Vacuum Concentrator RVC 2-33 IR
6 Operation
44
Version 08/2009, Rev. 2.1 of 02/12/2014 • sb
Translation of the original operating manual
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6.5.3.2 Program administration
Contrary to a manual evaporation process, a program is used for a timer-
controlled, pre-programmed process (evaporation program).
An evaporation program is divided into several sections. Every section of
the program has set values for the time, temperature, vacuum, safety
pressure, and speed.
You can create up to 16 individual evaporation programs. Up to 80 sections
can be assigned to each of these programs. A program always consists of
at least 3 sections.
NOTE
The higher the speed is, the more thermal energy will be produced
because of the waste heat of the drive unit and also because of the eddy
current losses of the magnetic coupling. If thermosensitive products are
processed, the speed can be set to a correspondingly low level in order to
prevent a too high energy input and, thereby, the excessive heating of the
product.
NOTE
If the temperature increases too quickly during an evaporation process, the
system is being supplied with too much energy. As a result, the vacuum
may collapse, which in turn will interrupt the evaporation process and may
destroy the product in the unit. In order to ensure a controlled process run,
there is no sudden increase or decrease of the setpoint between the
sections. Instead, the setpoint changes steadily. The defined section
setpoint is reached at the end of the respective section.
Calculation of the gradient see chapter 11.1 - "Mathematical relations".
Fig. 30: Graphical representation of the course of the control setpoint